First year Classics PhD candidate here, and I thought of another tip for the interviews, if it can help. Definitely seem generally passionate, but it really helps to have a research project thought up, so you can show that you know what the end goal of the program is. You can also show how your past interests tie into your future interests this way. Personally, it also gave me a lot more confidence going into the interview, since I knew what I was about. They ended up asking me this exact question: "If you were to start your thesis right now, what would it be about?" I'm so glad that I was ready. Anyway, good luck to all of you applying this cycle!